> exploit our permissive licensing to hijack our work

You cannot exploit permissive licensing when its entire purpose is to encourage others to use it.

Of course you can, its like putting candy for Halloween on the expectation that one kid is not going to get the whole bowl at once.

The way you can exploit an open license is to grab the code, invest massive amounts of resources in it and close the platform. Embrace, extend, and extinguish.